Software Engineer C++

West Sussex, England, United Kingdom

6/9/2025

SII Group delivers Digital Services, IT, Engineering, and Consulting to diverse industries, enabling digital transformation through our commitment to Growth, People, and CSR.

With over 16,000 professionals across 21 countries, we’re recognised as a “Great Place to Work” for fostering a high-trust culture. Our core values of Trust, Transparency, and Quality drive our work package delivery, ensuring we meet and exceed client expectations as a committed partner. Since 2016, SII UK has supported top Aerospace & Defense, Aviation, Transportation, and Finance clients, empowering digital transformation with industry-leading engineering expertise.

Let’s Tech Together is our promise to encourage innovation and teamwork. We support our engineers with development opportunities and a collaborative, inclusive environment where every voice is valued and empowered.

#Let'sTechTogether

THE OPPORTUNITY

As a Software Engineer, you will be part of a dynamic team responsible for developing software components in accordance with the Software Development Plan and agreed-upon requirements. You will contribute to the design, implementation, and maintenance of high-quality software solutions.

Key Responsibilities

• Deliver fully tested, maintainable software components in line with defined task objectives
• Contribute to the production of clear and traceable design specifications for new or modified functionality
• Ensure all development complies with governance, secure coding practices, and design review procedures
• Report progress to the Software Lead and Software Engineering Delivery Manager, supporting team-level delivery goals
  
  

Skills And Experience

Essential:

• Strong experience in software development using modern C++ (17 onwards minimum but 20 preferred) and Python
• Proven capability in the development of test harnesses and the design and implementation of automated tests within CI/CD environments
• Proven experience with commonly used tools and libraries, including Boost, nlohmann/json, and standard C++ STL components
• Familiarity with communication protocols such as WebSockets, SNMP, and Serial interfaces
• Experience working within Linux environments (e.g., RHEL 8.10 or later)
• Competence in using modern build systems, in particular CMake
• Proficiency in using Microsoft Office for technical documentation and communication
• Working knowledge of Agile practices such as Scrum, including toolchains like JIRA
• Experience using unit test frameworks such as GoogleTest integrated into the broader build and delivery workflow
• Proven experience of developing software with multiple threads in a team environment
  
  

Desirable

• Experience developing low-level drivers and working with embedded systems or hardware components
• Familiarity with using and editing in Atlassian Confluence
• Familiarity with Enterprise Architect or equivalent UML design tools
• Experience configuring and maintaining CI pipelines using Jenkins or similar automation platforms
• Familiarity with Bitbucket
• Awareness of requirements development & traceability
• Awareness of software quality and static analysis tools, e.g., Coverity, SonarQube
• Understanding of secure coding standards and safety/security-critical development requirements for C++
• Familiarity with SAST/DAST/SCA in a modern CyberSecurity conscious environment.
• Familiarity with container technologies such as Docker
  
  

Values & Behaviours

• Customer-focused mindset.
• Strong collaboration and teamwork skills.
• Ability to innovate and think critically.
• Analytical mindset for solving complex technical problems.
• Self-motivated with a proactive approach.
• Strong interpersonal skills, capable of working in a multidisciplinary environment.
• Ability to manage workload, prioritize tasks, and work under pressure to meet deadlines.
  
  

Benefits

• Competitive Basic Salary
• 6% Employers Contribution + 6% as a salary sacrifice
• Private Medical Insurance, Life Cover and Income Protection
• 25 days holiday
• 5 days full sick pay per year
• Flexible working
• Cycle to Work & TechScheme
• Continuous professional development
• Corporate access to the Udemy platform
• If you're applying for a role requiring security clearance, please be aware that foreign or dual nationality is not an automatic bar, however certain posts may have restrictions which could affect those who do not have sole British nationality or who have personal connections with certain countries outside the UK.
  
  

http://www.groupe-sii.com/en